(x y)²-6x² 6y² 9(x-y)²分解因式

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(x y)²-6x² 6y² 9(x-y)²分解因式
2x²+6x+y²=2xy-9,求xy平方

2x²+6x+y²=2xy-9x²-2xy+y²+x²+6x+9=0(x-y)²+(x+3)²=0因:(x-y)²≥0,

x^2-xy-6y^2+3xy+y+2

3xy是3x原式=(x-3y)(x+2y)+3x+y+2十字相乘x-3y2×x+2y1所以原式=(x-3y+2)(x+2y+1)

x²-6xy+9y²???因式分解

解题思路:本题主要利用完全平方公式进行因式分解即可求出结果解题过程:解:x²-6xy+9y²=(x-3y)2

约分:x²+y²-9-2xy/x²-y²+6x+9

原式=[(x^2-2xy+y^2)-3^2]/[(x^2+6x+9)-y^2]=[(x-y)^2-3^2]/[(x+3)^2-y^2]=[(x-y+3)(x-y-3)]/[(x+3+y)(x+3-y)

-2x^+xy+y^-6x-y-2

-2x^+xy+y^-5x-y-2=-[2x^-xy-y^+5x+y+2]=-[(2x+y)(x-y)+5x+y+2]=-[(2x+y)(x-y)+2*(2x+y)+(x-y+2)]=-[(2x+y)

化简.x^2-3xy/x^2-6xy+9y^2

x^2-3xy/x^2-6xy+9y^2=x(x-3y)/(x-3y)^2=x/(x-3y)

x*-2xy+3y*=9 4x*-5xy+6y*=30

Solution:x^2-2xy+3y^2=9(1)4x^2-5xy+6y^2=30(2)Eq(1)*5-Eq(2)*2,wehavex^2-y^2=5(3)Eq(2)-Eq(1),wegetx^2+

2 21.(2x+3y) -(x+2y) 2 2 2 22.3|x-3|+x -6xy+9y =0 则x y+2xy=?

1、平方差原式=[(2x+3y)+(x+2y)][(2x+3y)-(x+2y)]=(2x+3y+x+2y)(2x+3y-x-2y)=(3x+5y)(x+y)2、3|x-3|+(x-3y)²=

x²-6xy+9y² 因式分解怎么解????

解题思路:此题主要考查了利用完全平方公式分解因式,正确记忆完全平方公式是解题关键.解题过程:

已知x²+9y²+4x-6y+5=0,求xy的值

解题思路:根据题意,由完全平方公式的知识可求解题过程:varSWOC={};SWOC.tip=false;try{SWOCX2.OpenFile("http://dayi.prcedu.com/inc

{xy\x+y=6 xy\9x+4y=1

6x+6y=9x+4y3x-2y=0……1式6x+6y=xy……2式2式-1式乘以2得10y=xyx=10y=15请及时采纳

2x方-3x-6xy+9y

方是什么是平方吗再问:嗯再答:=x(2x-3)-3y(2x-3)=(2x-3)(x-3y)

因式分解:6xy平方-9x平方y-y立方

原式=-y(9x²-6xy+y²)=-y(3x-y)²

化简分式方程:x*x-xy-y*y/x*x-3x-6y+2xy

急不解决问题最后还是靠自己多动脑看课本其实都是课本上的再问:你看看啊!课本上没有,不会才问的!.........

化简:x-y/x+3y÷x^-y^2/x^2+6xy+9y^2-(xy/x+y)

[(x-y)/(x+3y)]/[(x^2-y^2)/(x^2+6xy+9y^2)]-xy/(x+y)=(x-y)/(x+3y)*(x+3y)^2/(x-y)(x+y)-xy/(x+y)=(x+3y)/

X平方-XY-6Y平方+2X-Y+1

X²-XY-6Y²+2X-Y+1=(X+1)²-Y(X+1)-6Y²=(X+1-3Y)(X+1+2Y)再问:学生不才老师您第一步我就不知道怎么得到的再答:X2-

9xy(x-y)(x+1)-3y(x-y)(3x+2y)+6y的平方(x-y)(x+1),因式分解

第一项与第三项先合并9xy(x-y)(x+1)-3y(x-y)(3x+2y)+6y^2*(x-y)(x+1)=(x-y)(x+1)(9xy+6y^2)-3y(x-y)(3x+2y)=(x-y)(x+1

1、(-7x^y)(2x^y-3xy^3+xy) 2、((x-y)^6)/((y-x)^3)/(x-y)

1、(-7x^y)(2x^y-3xy^3+xy)=-14x^(2y)+21x^(y+1)y^3-7x^(y+1)y;2、((x-y)^6)/((y-x)^3)/(x-y)=-(x-y)^3/(x-y)

(x-2xy)*(-xy+2y*y)-(3x*x-2xy)(x-9xy+6y*y)

原式=-x²y+2xy²+2x²y²-4xy³-3x³+27x³y-18x²y²+2x²y-18x&

已知x-y=3xy,且xy不等于0,则-3x+6xy+3y/(7x-5y)-9xy-(3x-y)

因为,x-y=3xy所以:-3x+6xy+3y/[(7x-5y)-9xy-(3x-y)]=[-3(x-y)+6xy]/[(7x-5y)-9xy-(3x-y)]=[-3*3xy+6xy]/[7x-5y-